border-1px(@color) {
  position: relative;
  &:after {
      display: block;
      position: absolute;
      left: 0;
      bottom: 0;
      width: 100%;
      border-top: 1px solid @color;
      content: '';
    }
}
bg-image(@url) {
  // background-image: url("img/+ @url + '@2x.png');
  // @media(-webkit-min-device-pixel-ratio:3),(min-device-pixel-ratio:3){
  //   background-image: url('img/'+@url+'@3x.png')
  // }
}
keyFrameAll(@value) {
  width: @value px;
  height: @value px;
  background-color: blue;
}
